ahh... I agree..... It's difficult to memorize . I have TOEFL/SAT/GRE/GMAT application made by Kaplan on Iphone. It's not bad . and I found a series of GRE-vocab on Smart Fm. The former is mobile , so sometimes I check them in my spare time for example , in restaurant and coffee store but The latter is web-based-application. It's fitting in learning at desk . Good luck ! http://www.technotalks.com/reviews/kaplan-intros-gre-exam-vocabulary-flashcards-app-for-iphone-ipod-touch/ http://smart.fm/